Acrylic block copolymer, resin composition and shaped article including the same, and optical component

a technology of acrylic block and resin composition, applied in the direction of optics, instruments, optical elements, etc., can solve the problems of limited use field of acrylic block copolymers, and achieve the effects of excellent light guiding properties, excellent transparency, and excellent extrusion properties of profile extruded shaped articles

Active Publication Date: 2018-04-26
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0026]By virtue of the configurations described above, the acrylic block copolymers provided according to the present invention attain excellent transparency, profile extrusion properties and surface smoothness of shaped articles, and also exhibit excellent light guiding properties.

Problems solved by technology

Unfortunately, the acrylic block copolymers have limited fields of use because of the fact that the physical properties of the copolymer alone are insufficient as compared to styrene-based block copolymers.

Method used

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  • Acrylic block copolymer, resin composition and shaped article including the same, and optical component
  • Acrylic block copolymer, resin composition and shaped article including the same, and optical component
  • Acrylic block copolymer, resin composition and shaped article including the same, and optical component

Examples

Experimental program
Comparison scheme
Effect test

examples 8 to 12

[0151]Examples 8 to 12

[0152]With use of a twin-screw extruder, the acrylic block copolymer (A1) obtained in Production Example 1 and phosphite-based compound (i) “ADK STAB PEP36 / 36A” (tradename, manufactured by ADEKA CORPORATION) were melt-kneaded in proportions described in Table 4 below at a cylinder temperature of 200° C., and the kneaded product was extruded and cut to give pellets of a resin composition. The results of the evaluation of this resin composition are described in Table 4.

examples 13 to 16

[0153]Examples 13 to 16

[0154]With use of a twin-screw extruder, the acrylic block copolymer (A1) obtained in Production Example 1, phosphite-based compound (i) “ADK STAB PEP36 / 36A”, phenol-based compound (ii) “ADK STAB AO60”, and phenol-based compound (iii) “ADK STAB AO20” (trade names, manufactured by ADEKA CORPORATION) were melt-kneaded in proportions described in Table 4 below at a cylinder temperature of 200° C., and the kneaded product was extruded and cut to give pellets of a resin composition. The results of the evaluation of this resin composition are described in Table 4.

TABLE 4Ex. 1Ex. 8Ex. 9Ex. 10Ex. 11Ex. 12Acrylic block copolymer (A)Acrylic block copolymer (A1) (parts by mass)100100100100100100AntioxidantsPhosphite-based compound (i) (parts by mass)0.020.050.10.20.3Phenol-based compound (ii) (parts by mass)Phenol-based compound (iii) (parts by mass)Color characteristics (lightness and chromaticity)L*97.197.197.197.197.197.1a*−0.2−0.2−0.1−0.1−0.1−0.1b*0.50.30.20.30.30.3E...

examples 17 to 21

[0156]Examples 17 to 21

[0157]With use of a twin-screw extruder, the acrylic block copolymer (A1) obtained in Production Example 1, phosphite-based compound (i) “ADK STAB PEP36 / 36A” (tradename, manufactured by ADEKA CORPORATION), blue pigment “3PA-5500A” (trade name, manufactured by Nippon Pigment Company Limited) and purple pigment“TV-4M” (trade name, manufactured by Nippon Pigment Company Limited) were melt-kneaded in proportions described in Table 5 below at a cylinder temperature of 20° C., and the kneaded product was extruded and cut to give pellets of a resin composition. The results of the evaluation of this resin composition are described in Table 5.

TABLE 5Ex. 10Ex. 17Ex. 18Ex. 19Ex. 20Ex. 21Acrylic block copolymer (A)Acrylic block copolymer (A1) (parts by mass)100100100100100100AntioxidantPhosphite-based compound (i) (parts by mass)0.10.10.10.10.10.1ColorantsBlue colorant (ppm)112510Purple colorant (ppm)15Chromaticity of light guide(at 10 cm distance from light source)x0.329...

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Abstract

The invention provides an acrylic block copolymer which has excellent transparency, profile extrusion properties and surface smoothness of shaped articles, and which is also excellent in light guiding properties. The acrylic block copolymer includes a polymer block (a1) predominantly containing methacrylic acid ester units and a polymer block (a2) predominantly containing acrylic acid ester units, and has a refractive index of 1.485 to 1.495 and an order-disorder transition temperature (ODTT) of not more than 260° C.

Description

TECHNICAL FIELD[0001]The present invention relates to an acrylic block copolymer, to a resin composition and a shaped article including the copolymer, and to an optical component. The present invention provides an acrylic block copolymer which has excellent transparency, profile extrusion properties and surface smoothness of shaped articles, and which is also excellent in light guiding properties.BACKGROUND ART[0002]Acrylic block copolymers that have a structure formed by bonding of an acrylic acid ester polymer block and a methacrylic acid ester polymer block are conventionally known to be useful in various fields because of their flexibility and outstanding transparency and weather resistance. Such acrylic block copolymers are used in, for example, films and sheets in the optical field, and outdoor construction materials. Unfortunately, the acrylic block copolymers have limited fields of use because of the fact that the physical properties of the copolymer alone are insufficient a...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08F297/02C08L53/00C08L33/02G02B1/04
CPCC08F297/02C08L53/00C08L33/02G02B1/045C08F297/026C08L33/12C08K5/526C08K5/524G02B1/04G02B6/00
Inventor SUGAWARA, TOSHIAKIOSHIMA, HIROSHI
Owner KURARAY CO LTD
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